| WELLMAN, INC. Patent applications |
| Patent application number | Title | Published |
|---|
| 20110212282 | Polyester Resins for High-Strength Articles - The present invention relates to slow-crystallizing, titanium-catalyzed polyethylene terephthalate resins that are useful for making high-strength, high-clarity bottles that possess improved resistance to stress cracking and thermal creep. The polyethylene terephthalate resins possess improved reheating profiles and are especially useful for making polyester articles that have exceptional clarity, dimensional stability, and thermal stability. | 09-01-2011 |
| 20100221472 | Polyester Resins for High-Strength Articles - The present invention relates to slow-crystallizing, titanium-catalyzed polyethylene terephthalate resins that are useful for making high-strength, high-clarity bottles that possess improved resistance to stress cracking and thermal creep. The polyethylene terephthalate resins possess improved reheating profiles and are especially useful for making polyester articles that have exceptional clarity, dimensional stability, and thermal stability. | 09-02-2010 |
| 20090306313 | Titanium-Nitride Catalyzed Polyester - The present invention relates to methods for making polyethylene terephthalate resin in which a titanium-nitride polycondensation catalyst is introduced prior to or during the initial stages of esterification or transesterification. | 12-10-2009 |
| 20090198022 | Solid Phase Polymerization Catalyst System - The invention is a method for making condensation polymers, such as polyethylene terephthalate polyester. The method includes introducing a catalyst system, which includes a coordination catalyst component and an acid component, to a polycondensation reaction. | 08-06-2009 |
| 20090187002 | Composite Solid Phase Polymerization Catalyst - The invention is a method for making condensation polymers, such as polyethylene terephthalate polyester. The method includes introducing to a polycondensation reaction a catalyst system that includes a coordination catalyst and a composite catalyst, which includes an acid component and an auxiliary component. | 07-23-2009 |
| 20090176046 | Polyester Resins for High-Strength Articles - The present invention relates to slow-crystallizing, titanium-catalyzed polyethylene terephthalate resins that are useful for making high-strength, high-clarity bottles that possess improved resistance to stress cracking and thermal creep. The polyethylene terephthalate resins possess improved reheating profiles and are especially useful for making polyester articles that have exceptional clarity, dimensional stability, and thermal stability. | 07-09-2009 |
| 20090093600 | Methods for Making Polyester Resins in Falling Film Melt Polycondensation Reactors - The present invention relates to methods for forming polyester resins in one or more falling film reactors. | 04-09-2009 |
| 20080274317 | Polyester Resins for High-Efficiency Injection Molding - The present invention relates to titanium-catalyzed polyethylene terephthalate resins that are capable of being formed into articles (e.g., carbonated soft drink and water bottle preforms) at reduced injection-molding cycle times. In particular, the titanium-catalyzed polyethylene terephthalate resins of the present invention can be formed into carbonated soft drink bottle preforms at reduced injection-molding cycle times to yield high-clarity, carbonated soft drink bottles that possess satisfactory resistance to stress cracking and thermal creep. | 11-06-2008 |
| 20080274316 | Alumina-Enhanced Polyester Resins and Methods for Making the Same - The invention embraces polymer resins, such as polyethylene terephthalate resin, that includes surface-compatibilized alumina. The invention also embraces methods of making polyethylene terephthalate resins that are capable of being formed into low-haze, high-clarity articles possessing reduced coefficient of friction. | 11-06-2008 |
